build(workflow): upgrade ssh-agent

Author: sjwall

.github/workflows/build.yml

@@ -44,7 +44,7 @@ jobs:
       - uses: actions/setup-node@v1
         with:
           node-version: '18.x'
-      - uses: webfactory/ssh-agent@v0.5.0
+      - uses: webfactory/ssh-agent@v0.9.0
         with:
           ssh-private-key: ${{ secrets.GH_PAGES_DEPLOY }}
       - name: Release to GitHub Pages